Process of producing colored composite materials



Patented Feb. 5, I929.

UNITED STA TES PATENT OFFICE.

eL-Eiviv n. wrttrs, or AKRON, OHIO, AssrGNon, BY mnsun-nssrenmnn'rs, r0rau- SEIB COMPANY,

OF AKRON, OHIO, A. CORPORATION OF OHIO.

IPIBOCESS OF PRODUCING COLORED COMPOSITE MATERIALS.

Ne Drawing.

This invention relates to new and useful improvements in processes-ofproducing colored composite materials. While any suitable base stockor-binding material may be used and various fillers employed, theinvention is particularly intended for use in manureadily as the soft,tacky binding ingredients,

resulting in an ununiform color to the finished product. This isparticularly. noticeable when the product is worn away, cut or abraded.As can bereadily seen, the higher the percentage of fiber or otherfiller used, the less uniformity will befound in the finished product.

It is therefore anobject of this invention to provide a new andusefulimprovement in processes for manufacturing composite materialwhichmaybe followed to produce a product havinga uniform colorthroughout.

A furtherobject of the invention is to produce a-new and improved methodof producing composite material in which the base stock may be" coloredwith a dry pigment or other coloring most suitable and the fibrousmaterial or filler may be-dyed any color or. shape corresponding-to thecolor of the base stock and to thereby provide a product hav ing auniform lasting color throughout.

The above objects are accomplished and additional ends are attained bythe process of manufacture hereinafter described, it being understoodthat changes and modifications may'be made or substitutions resorted towhich come within the spirit of the invention as set forth in theappended claims. I

In carrying out the invention, ordinary 1n-' strumentalities may beemployed and ordinary'pigments, dyes or other coloring materials mostsuitable to each particular ingredient maybe employed by any of thedyeing processes known to those versed in theart.

Briefly stated, the invention comprises coloring the base stock orbinding agent and separably coloring the fibrous, pulpous, gran nular orother filling material, then adding Applicationfiled October 81, 1927.Serial No. 229,805.

and incorporating the filling material into the base stock.

In carrying out my invention, I take a quantity of material such ascotton, wool,hair, jute, wood, fiber, sawdust, ground or granulatedcork,vegetable fiber, paper, leather, clay,

chalk or any pulpous, fibrous or absorbent 7 material. This material isdyed with an acid dye or other suitable dye by any of the processesknown in the art. I then take the bind ing material and reduce it to aplastic mass in a mill; To this plastic mass is added a drycolorwhichisthoroughlyincorporated intothe base stock by milling. Theresultant product is then sheeted or molded as desired and'isvulcanized, baked or otherwise cured.

As a particular example, I place in a mixmg millor other plastic mixingmachine, the following ingredients:

Per cent. Smoked sheet rubber Pure gum, inner tube reclaimed rubber 17Zinc oxide i 4 Lithopone 8 Lime 1 Cotton seed oil 3 Sulphur 1Diphenylguanidine Bombay red coloring pigment This is thoroughly milleduntil the red color- 1ng pigment is mixed with the-compound. I then takefibrous material such as 'hair and dye the same with an, acid dye orother suitable coloring matter to the exact shade of the compound,produced as above set forth. The hairis then dried and is introducedinto the mill and thoroughly mixed with the base stock to provide fortypercent of the composlte product thus produced. After the fibrousmaterial hasbeen thoroughly mixed with the base stock, the resultantmass is sheeted, molded or otherwise prepared for vulcanization. Theprocess of vulcanization desired. During vulcanization, a quantity ofthe bindingmaterial or for use in many ways and will present a un i-.form appearanceeven when sulqectcd to a Eat/o base stock will flow tothesu iace oi the mold thus forming a product having a'relatively toughimpervious skin on, the surface there- The product thus producedisadapted use xsuilicient to wear away the surface 1 thereof. V v q Whilethe product thusiormed is complete and maybe used as Vulcanized, itmaybe made more attractive and more suitable. for some uses by thefollowing step'szfThe sur-? face or skin may be removed to expose thecolored or dyed hair or.other filler, resulting in'an exceedinglyattractive product of unlform color. The removal of the surface skin maybe done in any'desired manner. It may be ground, out or subjected to theaction of awire brush as set forth and described in my ipendingapplication, ,Eierial Number 51,143,

Having thussetfOrth thoobjects of the inv'ention and described myimproved method in detail, what it claim-as new and desire to secure byLetters lPatent is'i l. That method'of manufacturing a colored compositematerial comprising; mixing filler with the base stock.

ored composite'material comprising mixing a base stock,"coloringthesame, separately coloring a'filler, then thoroughly mixing-the '2. Thatmethod of manufacturing a" colabase stock, coloring the same to thedesired shade, separately coloring ,a filler to match I thoroughlymixing the filler mixing the filler with the base st'ock.

' 3. That method of, manufacturing a colthev color of the base stock,then thoroughly ored composite material comprising mixing 'a basestock'luntil it is reduced to a plastic mass, thoroughly mixingtherewith a colored pigment, separatelycoloring a filler, then with thebase stock.

1. That method of manutacturing a colored composite material, comprisingmixing a base stock until it is reduced to a plastic mass, thoroughlymixing therewith a coloring pigment, coloring afiller' to match thecolor of the base stock, then thoroughly mixing the filler with a basestock.

5. That method of manufacturing a colored composite material, comprisingmixinga basecomp'oundvuntil it is reduced to a plastic, mass, mixing acoloring material there- 'with, coloring a filler with a diiierent coloring material, then thoroughly mixing-the col ored filler'withthe basestock. v 6; That methodiof manufacturing acoL- ior'ed composite materialcomprising, mixing a base'stock untll itis reduced to a plastic mass,thorgughlymixing a'coloring matter therewith, coloring a filler with adifierent coloring-material to the exactfshade" ofthe' colored basestock, then thoroughly mixing the colored filler with the colored basestock.

7 That method of manufacturing a colcolor of the base stock,thenthoroughly mixplastic mass, miXin inlring the dyed fiber with the rbber formed. .a

ored composite material comprising, mixing a base stock, coloring thesame, separatelycoloring a lihro'us material, then thoroughly mixing theiibrous material with a base stock.

8. That method Qoi manufacturing col-1: ored compositelmaterialcomprising, taking quantity er rubber, reducing it to .a plasticv mass,coloring the same to the desired shade,

separate] y coloring fibrous material to match the color 01": the basestock, then thoroughly mixing the fibrous material with the rubber 9.That method of manu'iacturing a col oredcomposite material comprising,taking a quantity of rubber, milling the same until it. isreduced to'aplastic mass, thoroughly milling a colpredpigment into'themass,separately coloring a filler, then thoroughly milling the filler intothe base stocka 10. That method of manufacturing a col-' ored compositematerial,domprisiiiig mixing a rubber basestock until it is reduced to aplastic mass, thoroughly inking,therewith a coloring pigment, dyeing afiller to match the ing the filler with a base stock; I -11. That method"or manufacturing a col-- ored composite material, comprising mining arubber compound until it is reduced to a a coloring material therewith,dyeing fi ers', then'thoroughly stock.

- 12. That method of manufacturing a colored composite materialcomprising: taking a quantity of rubber, milling it until it isredesired shape and submittingthe same to'vul.

caniZation.-' V v 14. That method of manufacturing acolored compositematerialcomprising mixing a base stock, coloringthe same, separatelycoloring a filler, then mixing the colored filler with the colored-basestock, forming the rj sultant mixtureiintoarticles' of the desired aseshape,submittin'g the same to vulcanization then removing the surfaceoithe article thus 15. That method of manufacturing a 001- ored comosite material comprisin mixing a base stock, coloring the same to t edesired; shade separately coloring a' filler to match the co or of thebase stock, thoroughly mixing the filler with the base stock, formingtheshape, curing the article; then abrading'the,

surface of the article to expose the .fill er f 16. That method pfmanufacturing a cplf ored' cqmfiosite material'co'mp'risin mixing a basestoc s u'bmitting the article to vuleanization, then removing the s urfa ce"of ;the article thus formed.

17. That methbdjd f mahu faeturing jaeoleolo'ring the same to t e'desired jstock forming theresultant mixture-into'the shade, separately:colorin a fillet" to match the coler of the 'base stoe 'thoro u ghlymixing the filler withthe base stock", forming the v miXtu-re into anarticle. Ofthe. desired shape,

bred c(Smposxite:material comprisingmixing 15 azrubber cpm'p'ound untllit is'reducedto a.

' plastic mass, mixing a coloring material therewith, I dyeing "fibers,vthen. thorou%hly I 'x'ing'the; "dyed fiber with the rubber ase desiredform, submitting the samefto Vulcan i'zatiomflthen remqving the surfaceof the article teiexposea portio 'of the fiber emjbed'ded"therein.

- I n i-tes'tiineny whereof Ihavelheiteunto set my hand.

GLENN H. 'w'ILiQIs

